A silicon carbide switch tube driving power supply circuit

By using a dual-input dual-output driver IC and a full-bridge rectifier structure with transformer T1, the problem of increased losses in traditional silicon carbide switching transistor driver circuits at high frequencies is solved, achieving stable and reliable 18V and -3V voltage outputs and improving system efficiency.

CN224367733UActive Publication Date: 2026-06-16SHENZHEN GOSPELL DIGITAL TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHENZHEN GOSPELL DIGITAL TECHNOLOGY CO LTD
Filing Date
2025-07-08
Publication Date
2026-06-16

AI Technical Summary

Technical Problem

Traditional silicon carbide switching transistor drive circuits suffer increased losses as the switching frequency increases, affecting system efficiency and making it difficult to stably and reliably provide 18V and -3V drive voltages.

Method used

A silicon carbide switching transistor drive power supply circuit is adopted. It utilizes a dual-input dual-output drive IC and transformer T1, and provides a high-frequency rectangular wave and regulated output of 18V and -3V voltages through a topology composed of a full-bridge rectifier and Zener diodes.

Benefits of technology

It achieves a simple topology, fewer components, and lower cost, and provides stable and reliable 18V and -3V voltages required by silicon carbide switching transistors, reducing losses and improving system efficiency.

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Abstract

The utility model belongs to circuit technical field discloses a silicon carbide switch tube drive power supply circuit, including port AUXPWM1 and port AUXPWM2, port AUXPWM1 connects one end of resistance R1, the other end of resistance R1 connects one end of resistance R4, one end of electric capacity C2 and the pin 2 of chip U1, port AUXPWM2 connects one end of resistance R2, the other end of resistance R2 connects one end of resistance R3, one end of electric capacity C1 and the pin 4 of chip U1, the pin 1 of chip U1 connects power supply port, the pin 8 of chip U1, the pin 6 of chip U1, one end of electric capacity C3 and one end of electric capacity C4. The utility model has the advantages of: topology is simple, and device is few, and cost is low, and the rectifier circuit adopts full -bridge rectification, and the required 18V voltage and negative 3V voltage of silicon carbide switch tube drive are stably and reliably provided.
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